Harm to buildings caused by water seepage and mold.

A. Causes wall peeling, blackening, leakage, damage to the decorative surface, and affects the aesthetics.

B. Waste space, furniture, floors, clothing, books, etc., breed mold.

C. Destroy the internal and external structure of the wall, causing the internal steel bars to rust and affect the firmness of the building.

D. Water vapor will enter electrical devices, damage household appliances, and cause safety hazards.

E. The groundwater is abundant, entering the wall through concrete, corroding various pipelines, causing corrosion or cracking.